Renewable energies!

We have done a debate about renewable energies. We were two pairs; one of them was talking about de advantages and the other about the disadvantages.
We have enjoyed it a lot, because in this way you learn and you feel more involve in daily energy problems in Spain.
Advantages:


Disadvantages:

Sensors

• What motion sensors are?

A motion dectector is a device that detects moving objects, particularly people, they form a vital component of security.
There are several types of motion detectors:

      -Passive infrared (PIR): They detect person's skin temperature  through emitted black body radiation at mid-infrared wavelengths in contrast to the surrounding objects.  

     -Microwave: Similar to radar speed gun (an emission of a continuous wave of microwave radiation).

    -Ultrasonic: An ultrasonic wave (sound at a frequency higher than a   human can hear) is emitted and reflections from nearby objects are received.

   -Tomographic motion detector:They sense disturbances to radio waves as they pass from node to node of a mesh network. 

    -Video camera software: Digital cameras.

• What sound detectors are?

The sound detector is a small board that combines a microphone and some processing circuitry

The use is as an alarm system, for example: if someone is trying to break into your house and break a window or something else, a sound detector will sense the sound coming from the breaking glass and set off an alarm.

WHATSAPP IS SHIELDED!

Whatsapp, the largest and one of the most used applications, has developed a new security system.

It has introduced the «end-to-end» code in their android version , but they have not applied it to apple devices yet. This code encripts the messages that you send in order to avoid the server being hacked and taking your information through: reading your chats, downloading your media, etc.

The application will use the free code TextSecure software, created by the Open Whisper Systems  organisation. This just consists of an app that allows you to take back your privacy while you communicate with your friends. Whatsapp has applied it because other famous apps such as Telegram use it and people rely on them more than they did  with whatsapp.

It was unbelievable that one of  the best communication applications was one of the most unsafe.

Consumers will not notice the change, but this will be very helpful for them.

Thanks to this, whatsapp can not read our conversations!

All the points considered, this is very important for us, because we use whatsapp constantly and the fact of being spied on is not very attractive.

 For more information...

You can read this article in ABC

and go to Google Play

HEY BLOGGERS

Hello,We are students from IES Jaime Ferrán and on this blog we are going to post mainly about our technology class issues. We will write about our interests, our likes and dislikes, our opinions... too.

Welcome to our blog!!

            MUAK <3

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